An inexpensive approach to improving data derived from single photon emission computed tomography

The issue of inadequate solid standards for correcting nonuniformity in single photon emission computed tomography was addressed. Controlled, complex, motion of commercially available cobalt-57 standards was found to enhance the perceived nonuniformity of the standard and to minimize the effects of any local flaws. This manoeuvre provides a better standard than a refillable liquid phantom without the problems inherent in radioactive liquid standards which include: phantom deformation, poor mixing, absence of retrospective verification, accidental contamination and substantial handling requirements. (author)